But now that it's close (middle to end of next year)
My wife and I are less than 1 year away from a nest egg that will cover a 4% SWR.
How do you guys measure a number so full of estimates and assumptions with such precision? I'd think that at best, if I had to point at my FI date on a calendar it would be a vague blob covering at least 3 years, but y'all sound like you'll be able to locate it within a 6-month window. Is it truly tied to a "magic number", or is it more other life-events that narrow the focus of that blob for you?
For years, my "FI date" was going to be when I had my mortgage paid off; my net worth would hopefully be somewhere within the range covered by the blob at that point, and the mortgage payoff would give me that artificially precise point at which I could decide to declare FI. But now that I paid it off 6 years earlier than I was planning, I feel a lot more adrift in knowing what my "FI date" actually is, because now I have *only* that highly-fluctuating and assumption-filled number base my decision on.
I mean, in a one year period of 2008, my net worth dropped 20% (really more like 30% considering that I still pumped $50k into investments that year). In the next 1 year period, it jumped 36%. And in the last 12 months, it's increased only 2%, with similar $50k savings/year over all those 12-month periods. Those big swings are enough to change a 4% SWR into a 3% SWR and vice-versa. It seems like the only way you could predict your FI date with more precision than a multi-year blob is if your savings rate is so high that it dominates over the noise of market fluctuations. Like if you save $100k/year and only need a $500k nest-egg; then a 10% fluctuation in the market over a year (up or down, which is pretty standard) would amount to only half of what you're adding. Working a year less than that would almost surely leave you with too little, and a year longer almost surely with too much.
Another way of putting it is that if I could look backwards from the moment I die, it would be (theoretically) possible to look at my remaining stash and the entire history of my earning and spending and determine the actual day upon which I reached FI. But trying to predict it now? I'd be shocked and amazed if I could come with 5 years of the actual date.
Anyway, point is, I say don't bother with any jitters, because if you think you're that close to FI, there's a good chance you've actually reached it already, and the only time you'll ever know for sure is when you're dead, so why worry about it? :-)